I've sorted the links by name, alphabetically. This is pursuant to discussion here. I've included both a single-choice and a multiple-choice poll because considering many pieces of software to be user-friendly is a valid response. Sorry I could not include all the options, there's a limit of 10.

What qualities do the software you consider to be "user-friendly" have that the others lack that gives them the edge?

I really have to face the music: I am a foobar2000 fanboy. To me, there is no software that compares. The one place where foobar2000 is not user-friendly is in configuration. However, this is irrelevant to me, because configuration is complicated regardless of the software you choose to use.

foobar2000 makes everything easy, and after being configured once, allows immediate access to a whole slew of features, from conversion, to ReplayGain, to secure ripping, to tagging, to moving. All of these are quick, efficient, and streamlined. It's the fastest way to work with my music. The speed at which it works is directly related to its ease-of-use. The Properties dialog, where all the usual tagging happens, is the best solution I have ever seen to the difficult problem of mass-tagging. Sure there are features that will grab metadata from elsewhere, but none of them come without caveats.

It has proven its ease-of-use and user-friendliness over the years, as I introduce new people to it and watch them clue in to both how powerful it is and how natural it is. The focus of foobar2000 has always been significantly on the UI. Initially, it was simply that the UI was Win32 as opposed to the abortions that were skinned players at the time. Even as a simple noisy notepad, however, foobar2000 has had the power to make the user-experience simple and effective.

On top of all of the simple features, foobar2000 offers a huge library of more complicated technical features. However, you don't need to even look at the technical features.